Model 3770
DC STRAIN GAGE PANEL METER
3770 SPECIFICATIONS
Measurement Range:
Adjustable; 0.5 to 10 mV/V; nominal full-scale. Dependent on Excitation level selected
Transducer Types:
Conventional 4-arm strain gage bridges, 120 to 10 k ohm
Excitation
: Selectable: 5.0 or 10.0 Vdc, with remote sense lines. Up to 70 mA.
Power Supply:
Voltage 90 - 250 VAC, 47 -63 Hz
Amplifier
Normal - Mode Range:
±
0.2
V RMS operating; ±
28 V without instrument damage
Common - Mode Range:
± 3 V
Input Impedance:
Differential
>10 M
Ω
Offset
: vs. Temperature: ±30 ppm µV/°C; vs. Time: ±10 ppm/month
Gain Accuracy:
Limited only by calibration accuracy
Gain Stability:
vs. Temperature: ±30 ppm/°C; vs. Time: ±10 ppm/month
Linearity
: better than ± 0.03% of full scale
Filter
: 3-pole modified Butterworth; 3 dB down at 2 Hz, 20 Hz or 200 Hz; selectable.
Fast output always enabled, 5 KHz response (J3 Pin 3).
Step-Response Settling Times for the 3770 (in milliseconds)
3db Frequency
To within 1% within .1% within .02%
Fast Output
5000 Hz
0.14
0.10
0.08
Selectable Output
200 Hz
3.7
5.0
5.6
20 Hz
37
50
56
2 Hz
370
500
560
1. a
P
ANEL
M
OUNTING
You can easily mount the instrument in your own precut panel. Cutout dimensions for a
panel-
mounted
unit are standard
DIN
; panel thickness should not exceed 6 mm (0.24 in).S i m p l y u n s c r e w
t h e t w o r e a r -p a n e l C L A M P S C R E W S a n d s l i d e t h e C L A M P SLIDES rearwards out of their
grooves (THE FRONT BEZEL NEED NOT BE REMOVED). Insert the unit through the panel
cutout,
from the front of the panel
(if t h e u n i t h a s r u b b e r f e e t , t h e s e w i l l h a v e t o b e
r e m o v e d ) . T h e n r e i n s t a l l t h e CLAMP SLIDES, and tighten the CLAMP SCREWS until the
instrument is securely mounted.
Page
6
Consumption 10 Watts
Physical Parameters:
5. 68” W x 2. 84” H x 7. 06” D; weight - 3. 25 Lbs.
Analog Output:
selectable; ± 5, ±1 0 VDC, 4 -20 mA or 4 -12 -20 mA (20 % over -range on voltage outputs only)
Operating Temperature:
0 to +55 Degrees C, 5 to 95% relative humidity, non-condensing
Altitude:
2000m (6560 ft) maximum
Installation Category:
Installation Category II, Pollution Degree 2
